Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fce39e6befc65c5…

MALICIOUS

PDF

40.1 KB Created: 2020-09-11 05:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4861002a1448631fb3e7e73e51930e09 SHA-1: 8169b2acabcd2ff37bd579d51e4aedcde9410cdc SHA-256: 1fce39e6befc65c50df7ba298e403f5da39ada8a30fb56d0d7ec92fbb8b22c5e
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.me/wix?keyword=hypertension+guidelines+south+africa', which is likely the intended destination for the user. The file also contains a large number of embedded links, many pointing to shopify.com, which is flagged as a PDF link farm, suggesting a tactic to artificially inflate search engine rankings or distribute malicious content.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.me/wix?keyword=hypertension+guidelines+south+africa
    • http://files.seybridgepharmacyandgifts.com/uploads/1/3/1/3/131398242/ef384f8d64.pdf
    • http://files.milanibowhunting.com/uploads/1/3/1/8/131855992/b16a699.pdf
    • http://files.joffemillwork.com/uploads/1/3/0/7/130738889/kejisubutewurifev.pdf
    • http://files.lennoxheadlandcare.org/uploads/1/3/1/3/131384101/7d4f0bb4590.pdf
    • http://notuti.shiragirlschoir.org/uploads/1/3/1/4/131437299/fugamuzovipowejore.pdf
    • https://cdn.shopify.com/s/files/1/0462/2771/8293/files/atypical_netflix_series.pdf
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/discord_how_to_bold_text.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/asp_gridview_css_templates.pdf
    • https://cdn.shopify.com/s/files/1/0433/5501/3275/files/ashrae_handbook_fundamentals_volume.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/33030524770.pdf
    • https://static.usrfiles.com/ugd/1b8612_2c7ee284c3684cf2921714b8cbef85b3.pdf
    • https://static.usrfiles.com/ugd/bcc0e4_1fbbdc0e1b4c48ba9f747da086ee0b87.pdf
    • https://static.usrfiles.com/ugd/b8c837_90e518543667433cbb1d34ab83fc318a.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e98.bin
a72aabf1307a423a004914a31343bfc52b1e1af5ad9da0f81ebbd4bed2a495a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E98 5480 bytes
font_01_sfnt_off0000713e.bin
ca5a875cf7b4e03731d2bd9a56f28c1c020b313f21b42f3e16335be18219c670		 pdf-font-stream PDF embedded font (sfnt) at offset 0x713E 10088 bytes

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